Bulletin of Entomological Research (1993) 83, 321-328

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H. van den Berg, M.J.W. Cock, G.I. Oduor and E.K. Onsongo (1993)
Incidence of Helicoverpa armigera (Lepidoptera: Noctuidae) and its natural enemies on smallholder crops in Kenya
Bulletin of Entomological Research 83 (3), 321-328
Abstract: Smallholder crops (sunflower, maize, sorghum and cotton) were grown in experimental plots at seven sites, representing different agricultural zones of Kenya, over four seasons. Helicoverpa armigera (Hübner) (formerly Heliothis armigera) only occasionally achieved population densities sufficient to cause obvious damage to the crops, and was virtually absent from the coastal sites. At the inland sites, infestation and mortality levels varied greatly. Information is presented on the incidence of H. armigera, and the identity, distribution and frequency of its common parasitoids and (potential) predators, sampled in the experimental plots. Trichogrammatoidea spp., egg parasitoids, and Linnaemya longirostris (Macquart), a tachinid late-larval parasitoid, were the most common parasitoid species, but total percentage parasitism was rather low. Of the large complex of predators, only anthocorids and ants (predominantly Pheidole spp., Myrmicaria spp. and Camponotus spp.) were sufficiently common and widespread to be of importance in suppressing H. armigera. The abundance of predators fluctuated widely between sites, but anthocorids were most abundant at the western sites.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Matthew J.W. Cock, H. Van Den Berg

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Helicoverpa armigera Maize/corn (Zea mays) Kenya
Helicoverpa armigera Sunflower (Helianthus annuus) Kenya
Helicoverpa armigera Cotton (Gossypium) Kenya
Helicoverpa armigera Sorghum (crop) Kenya
Cheilomenes lunata (predator) Kenya
Orius tantillus (predator) Helicoverpa armigera Kenya
Orius albidipennis (predator) Helicoverpa armigera Kenya
Meteorus laphygmarum (parasitoid) Helicoverpa armigera Kenya
Nabis capsiformis (predator) Helicoverpa armigera Kenya
Myrmicaria opaciventris (predator) Helicoverpa armigera Kenya
Platynaspis capicola (predator) Kenya
Trichogrammatoidea armigera (parasitoid) Helicoverpa armigera Kenya
Trichogrammatoidea eldanae (parasitoid) Helicoverpa armigera Kenya
Trichogrammatoidea lutea (parasitoid) Helicoverpa armigera Kenya
Trichogrammatoidea simmondsi (parasitoid) Helicoverpa armigera Kenya
Telenomus ullyetti (parasitoid) Helicoverpa armigera Kenya
Palexorista laxa (parasitoid) Helicoverpa armigera Kenya
Cheilomenes propinqua (predator) Kenya
Exochomus ventralis (predator) Kenya
Cardiastethus exiguus (predator) Helicoverpa armigera Kenya
Orius thripoborus (predator) Helicoverpa armigera Kenya
Geocoris amabilis (predator) Helicoverpa armigera Kenya
Linnaemya longirostris (parasitoid) Helicoverpa armigera Kenya
Euplectrus laphygmae (parasitoid) Helicoverpa armigera Kenya
Charops ater (parasitoid) Helicoverpa armigera Kenya